A group of researchers has recently discovered a common transparent ceramic amongst hundreds of extrasolar planets or exoplanets. The team says that this ceramic may sometime become a flowing liquid metal, which in turn would probably prove to be a protector for the distant worlds.

It is being said that the liquid metal may shield the supersized alien versions of Earth from harmful radiation. The distant worlds or super-Earths, as dubbed, are rocky planets, which look similar to Earth, but are actually larger in size.

It has been told that these are some 10 times the mass of Earth. This is the reason why these planets may bring more internal pressures than the pressure of Earth. As a consequence, large viscosities may be seen along with high melting temperatures, which further mean that the interiors of super-Earths would not get separated into rocky mantles.

Also, possibly their interiors would not be divided into metallic cores as the interiors of Earth do. The researchers say that some super-Earths may even support water oceans on their surfaces, while some others may be diamond planets.

"What was most surprising was how well-behaved magnesium oxide is in the laboratory", said author R. Stewart McWilliams.